Wrench.



J. C. PURCELL.

WRENCH. IAPPUCATION FILED NOV. 3, i915.

Patented Jan. 16, 1917.

aonn' c. rnncnnn, onn'nrihnvnn, onto.

wnnncn.

Specification of Letters Patent.

Patented J an. 1 6, Mitt.

To all whom it may concern:

Be it known that T, JOHN C. Pnncnnn, a citizen of the United States, residing at Eellevue, in the county of Huron and State of Ohio, have invented a certain new and useful Improvement in Vvrenches, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

An object of this invention is to provide a simple, efficient and durable wrench adapted for use both as a nut Wrench and a plpe wrench.

Tn carrying out my invention I provide a Wrench having the usual smooth jaws adapted for gripping nuts, and I also provide auxiliary jaws adapted to be readily and quickly attached to the wrench jaws, and which may cooperate with such jaws to adapt the wrench for gripping curved or cylindrical surfaces such as pipes and the like.

A more specific object is to so mount one of the auxiliary jaw members that it may powerfully grip the pipe or other article to be turned and may quickly release its hold when the pressure is released and may also be adapted to cooperate with the wrench in such a manner that its gripping movement is limited, thereby reventing crushing or distortion of the peas to be turned.

Another object is to so arrange the wrench that it may be quickly and accurately adjusted to the object to be turned.

The above and other objects will become apparent in the following description which refers to the accompanying drawings, and the essential characteristics are set forth in the claims.

Referring to the drawings, Figure. 1 is a side elevation of my wrench; Fig. 2 is a vertical section through the same; Fig. 3 is a section on the line 33 of Fig. 1, illustrating the removable means for securing the jaws in place; Fig. 4 is a sectional detail taken on the line 44 of Fig. 2.

The eneral arrangement of my invention is simfiar to that of the usual monkey vwrench. A head 5 is preferably integral with the shank 6, which is shown as having a suitable integral handle 7. Between the head and handle the shank is preferably rectangular and slidably carries a mpvable jaw having a portion 11 100 ing around the shank and having a depen ing portion 12 extending along the shank and having at its lower end teeth 15 adapted to coact with corresponding ratchet teeth 16 on the adjacent shank. The teeth 15 are brought into engagement with the teeth 16 by means of a spring 18 pressing outwardly against a connecting portion 19 of a strap 20, shown as riveted at 21 to the depending member 12. The inner end of the spring is guided by a projecting lug 25 integral with a substantially rectangular non-friction member 26 bearing against the shank 6 and held against displacement by lugs 28 engaging coacting grooves 29 in the strap members 20.

It will be seen that by pressing inwardly on the portion 19 the teeth 15 may be drawn out of engagement with the teeth 16 on the shank, the spring 18 being compressed, and the movable jaw 10 may be then slid longitudinally of the shank 6 in either direction. The engagement of the lugs 28 with the grooves causes the member 26 to maintain its normal position relative to the strap 20 while permitting the strap to be moved crosswise of the shank. When the jaws are brought into engagement with the article to be turned the pressure on the portion 19 is released and the teeth 15 again engage the teeth 16, looking the movable jaw in such position. A suitable strip abutment for limiting the movement of the movable jaw toward the handle, is shown as a member 30 extending entirely around the handle and secured thereto.

The auxiliary jaws which adapt the Wrench for turning pipes and other curved articles, will now be described. A substantially flat rectangular member 32 having serrations or teeth on its under side is adapted to be secured against the under side of the head 5 by means of upwardly extending wings 34 closely embracing the sides of the head. A pin 35 having a suitable head 36 .is shown as extending through registering openings in the wings 34 and the head 5. At the end opposite the head the pin is provided with a groove 38 which is engaged by a spring 37 preventing the inadvertent removal of the pin. It will be seen that by drawing the spring 37 out of engagement with the groove the pin may be withdrawn from the position shown and this auxiliary jaw member may be then removed.

A corresponding auxiliary jaw member adapted to be attached to thejaw 10 comprises a rectangular portion 40 having scrrations on its upper side and having integral wings 42 closely embracing the sides of the jaw 10.v Extending through registering openings in the wings 42 and the jaw 10 is a pin 4A, similar to the pin 35, held against inadvertent removal by a spring 45. When the jaw is in position, secured by the pin, it will be noted that the portion stands away from the the upper side of the jaw 10 and is thereby free to swing about 'the pin 44 from the position shown in Fig. 1 to that shown in Fig. 2. When 'apipe or other article is gripped in these jaws the swinging of the handle of the wrench in the direction to turn the pipe causes the jaw 40 to swing upwardly and inwardly about its pivot, closely gripping the pipe until the inner edge of the member 40 abuts the shank, as shown at 4:7. ThLSlimits the inward'movement and prevents the jaw 40 from swinging toward the jaw 32 sufiiciently to crush or distort the pipe.

A spring, indicated at 48, positioned closely adjacent to the shank 6, is adapted to press the inner edge of the member &0 upwardly, thereby quickly releasing the grip of the pipe'wrench jaw, immediately upon a slight backward movement of the handle 7. This spring is preferably secured to the member 40 so that when this member is removed from the wrench it may not become emons lost and the movable jaw against which it bears is thereby left free from projections.

It will be noted from the foregoing description that my wrench is not only quickly adjustable but as the angle of the movable jaw need not be changed appreciably with relation to the shank to disengage the teeth 15, the jaws may be brought into close engagement with the parallel sides of a nut or similar article. The spacing of the teeth 15 and 16 is preferably commensurate with the size of the wrench and the work which it is adapted to do. Accordingly, it is at once apparent that with my wrench a very accurate adjustment is possible.

Having thus described my invention, what I claim is:

In a wrench,'the combination with a pair of jaws, of an attachment comprising a channel -'shaped member having serrations on its external intermediate face, the wings of said member being integral therewith and adapted to lie on the two sides of one of the jaws, a removable pin extending through both wings and the intermediate jaw, and a spring secured to said attachment and adapted to lie in a groove in said pin for temporarily holding it in place.

In testimony whereof, I hereunto ailix my signature.

JOHN G. PURCELL. 

